48 Works

Data from: Pre-dispersal seed predation and pollen limitation constrain population growth across the geographic distribution of Astragalus utahensis

Kathryn C. Baer & John L. Maron
1. A central focus of ecology is to understand the conditions under which biotic interactions affect species’ abundance and distribution. Classic and recent studies have shown that biotic interactions can strongly impact local or regional patterns of species abundance, but two fundamental questions remain largely unaddressed for non-competitive biotic interactions. First, do the effects of these interactions on population performance change predictably with environmental context? Second, to what extent do population-scale effects contribute to limiting...

Data from: The role of hybridization during ecological divergence of southwestern white pine (Pinus strobiformis) and limber pine (P. flexilis)

Mitra Menon, Justin C. Bagley, Christopher J. Friedline, Amy V. Whipple, Anna W. Schoettle, Alejandro Lael-Saenz, Christian Wehenkel, Francisco Molina-Freaner, Lluvia Flores-Renteria, M. Socorro Gonzalez-Elizondo, Richard A. Sniezko, Samuel A. Cushman, Kristen M. Waring & Andrew J. Eckert
Interactions between extrinsic factors, such as disruptive selection, and intrinsic factors, such as genetic incompatibilities among loci, often contribute towards the maintenance of species boundaries. The relative roles of these factors in the establishment of reproductive isolation can be examined using species pairs characterized by gene flow throughout their divergence history. We investigated the process of speciation and the maintenance of species boundaries between Pinus strobiformis and P. flexilis. Utilizing ecological niche modeling, demographic modeling,...

Data from: Applying ecological site concepts and state-and-transition models to a grazed riparian rangeland

Felix Ratcliff, James Bartolome, Luke Macaulay, Sheri Spiegal & Michael D. White
Ecological sites and state-and-transition models are useful tools for generating and testing hypotheses about drivers of vegetation composition in rangeland systems. These models have been widely implemented in upland rangelands, but comparatively little attention has been given to developing ecological site concepts for rangeland riparian areas, and additional environmental criteria may be necessary to classify riparian ecological sites. Between 2013 and 2016, fifteen study reaches on five creeks were studied at Tejon Ranch in southern...

Data from: Relative importance of competition and plant-soil feedback, their synergy, context dependency and implications for coexistence

Ylva Lekberg, James D. Bever, Rebecca A. Bunn, Ray M. Callaway, Miranda M. Hart, Stephanie N. Kivlin, John Klironomos, Beau G. Larkin, John L. Maron, Kurt O. Reinhart, Michael Remke, Wim H. Van Der Putten & Ragan M. Callaway
Plants interact simultaneously with each other and with soil biota, yet the relative importance of competition versus plant soil feedback (PSF) on plant performance is poorly understood. Using a meta-analysis of 38 published studies and 150 plant species, we show that effects of interspecific competition (either growing plants with a competitor or singly, or comparing inter- vs. intraspecific competition) and PSF (comparing home vs. away soil, live vs. sterile soil, or control vs. fungicide-treated soil)...

Data from: Cross-scale occupancy dynamics of a post-fire specialist in response to variation across a fire regime

Morgan W. Tingley, Andrew N. Stillman, Robert L. Wilkerson, Christine A. Howell, Sarah C. Sawyer & Rodney B. Siegel
1. Fire creates challenges and opportunities for wildlife through rapid destruction, modification, and creation of habitat. Fire has spatially variable effects on landscapes, however, and for species that benefit from the ephemeral resource patches created by fire, it is critical to understand characteristics of fires that promote post-fire colonization and persistence, and the spatial scales on which they operate. 2. Using a model post-fire specialist, the black-backed woodpecker (Picoides arcticus), we examined how colonization and...

Data from: Root responses to elevated CO2, warming, and irrigation in a semi-arid grassland: integrating biomass, length, and life span in a 5‐year field experiment

Kevin E. Mueller, Daniel R. LeCain, M. Luke McCormack, Elise Pendall, Mary Carlson & Dana M. Blumenthal
1.Plant roots mediate the impacts of environmental change on ecosystems, yet knowledge of root responses to environmental change is limited because few experiments evaluate multiple environmental factors and their interactions. Inferences about root functions are also limited because root length dynamics are rarely measured. 2.Using a five‐year experiment in a mixed‐grass prairie, we report the responses of root biomass, length, and lifespan to elevated carbon dioxide (CO2), warming, elevated CO2 and warming combined, and irrigation....

Data from: Anatomy of a neotropical insect radiation

Isaac Scott Winkler, Sonja J. Scheffer, Matthew L. Lewis, Kristina J. Ottens, Andrew P. Rasmussen, Géssica A. Gomes-Costa, Luz Maria Huerto Santillan, Marty A. Condon & Andrew A. Forbes
Background: Much evolutionary theory predicts that diversity arises via both adaptive radiation (diversification driven by selection against niche-overlap within communities) and divergence of geographically isolated populations. We focus on tropical fruit flies (Blepharoneura, Tephritidae) that reveal unexpected patterns of niche-overlap within local communities. Throughout the Neotropics, multiple sympatric non-interbreeding populations often share the same highly specialized patterns of host use (e.g., flies are specialists on flowers of a single gender of a single species of...

Data from: Risk taking of educated nematodes

Denis S. Willett, Hans T. Alborn, Lukasz L. Stelinski & David I. Shapiro-Ilan
Nematode parasites rely on successful host infection to perpetuate their species. Infection by individual nematode parasites can be risky, however; any one individual could be killed by the host's immune response. Here we use a model system to show that environmental cues and parasite past experience can be used by entomopathogenic nematodes to reduce individual risk of infection. Past parasite experience can more than double the infective virulence (number of host invaders) of a given...

Data from: Variability in community productivity: mediating effects of vegetation attributes

Wayne H. Polley & Brian J. Wilsey
1. Plant productivity varies though time in response to environmental fluctuations. Reducing variability in productivity requires an improved understanding of how plant community attributes interact with environmental fluctuations to influence plant growth dynamics. We evaluated links between two community attributes, species diversity and abundance-weighted values of specific leaf area (SLA), and temporal variability in grassland productivity at patch (local) and aggregate (multi-patch) spatial scales. 2. Aggregate communities were created by combining patches of spatially-distinct communities...

Data from: A heritable symbiont and host-associated factors shape fungal endophyte communities across spatial scales

Joshua G. Harrison, Thomas L. Parchman, Daniel Cook, Dale R. Gardner & Matthew L. Forister
1. Although microbial ecologists are intensely interested in the processes governing microbial community assembly, progress has been limited by a lack of studies that span multiple geographical scales and levels of biological organization. 2. We used high throughput sequencing to characterize foliar fungal endophyte communities and host plant genetic structure both within, and among, 24 populations of spotted locoweed (Astragalus lentiginosus) across the Great Basin Desert. 3. Across the Great Basin, both within, and among...

Data from: Quantitative trait loci for cold tolerance in chickpea

Clarice J. Coyne, Deus Mugabe, Julia Piaskowski, Ping Zheng, Yu Ma, Erik Landry, Rebecca McGee, Dorrie Main, George Vandemark, Hongbin Zhang & Shahal Abbo
Fall-sown chickpea (Cicer arietinum L.) yields are often double those of spring-sown chickpea in regions with Mediterranean climates that have mild winters. However, winter kill can limit the productivity of fall-sown chickpea. Developing cold-tolerant chickpea would allow the expansion of the current geographic range where chickpea is grown and also improve productivity. The objective of this study was to identify the quantitative trait loci (QTL) associated with cold tolerance in chickpea. An interspecific recombinant inbred...

Data from: Phylogenomics supports incongruence between ecological specialization and taxonomy in a charismatic clade of buck moths

Julian R. Dupuis, Richard S. Peigler, Scott M. Geib & Daniel Rubinoff
Local adaptation can be a fundamental component of speciation, but its dynamics in relation to gene flow are not necessarily straightforward. Herbivorous taxa with localized host plant or habitat specialization across their geographic range are ideal models for investigating the patterns and constraints of local adaptation and its impact on diversification. The charismatic, day-flying moths of the Hemileuca maia species complex (Lepidoptera: Saturniidae) are such taxa, as they are geographically-widespread, exhibit considerable ecological and morphological...

Data from: Declining demographic performance and dispersal limitation influence the geographic distribution of the perennial forb, Astragalus utahensis (fabaceae)

Kathryn C. Baer & John L. Maron
1. A central goal of ecology is understanding the determinants of species’ distributions. ‘Metapopulation’ models for the existence of distributional boundaries predict that species’ geographic ranges arise from the landscape-scale deterioration of habitat suitability towards the range edge (i.e. niche mechanisms), which simultaneously hinders demographic performance and limits dispersal to suitable habitat beyond the edge (i.e. dispersal limitation). However, few studies have examined both of these mechanisms for the same species by examining abundance and...

Data from: Functional responses in habitat selection: clarifying hypotheses and interpretations

Joseph D. Holbrook, Lucretia E. Olson, Nicholas J. DeCesare, Mark Hebblewhite, John R. Squires & Robin Steenweg
A fundamental challenge in habitat ecology and management is understanding the mechanisms generating animal distributions. Studies of habitat selection provide a lens into such mechanisms, but are often limited by unrealistic assumptions. For example, most studies assume that habitat selection is constant with respect to the availability of resources, such that habitat use remains proportional to availability. To the contrary, a growing body of work has shown the fallacy of this assumption, indicating that animals...

Data from: Intraspecific niche models for ponderosa pine (Pinus ponderosa) suggest potential variability in population-level response to climate change.

Kaitlin C. Maguire, Douglas J. Shinneman, Kevin M. Potter & Valerie D. Hipkins
Unique responses to climate change can occur across intraspecific levels, resulting in individualistic adaptation or movement patterns among populations within a given species. Thus, the need to model potential responses among genetically distinct populations within a species is increasingly recognized. However, predictive models of future distributions are regularly fit at the species level, often because intraspecific variation is unknown or is identified only within limited sample locations. In this study, we considered the role of...

Data from: Spatial, temporal, and experimental: three study design cornerstones for establishing defensible numeric criteria in freshwater ecosystems

Jason M. Taylor, Jeffrey A. Back, Bryan W. Brooks & Ryan S. King
1.Nutrient over‐enrichment increasingly threatens global water resources. Stressor‐response studies specifically designed to identify levels of nutrients strongly associated with undesirable ecological conditions are needed to inform numeric nutrient criteria that protect inland waters. 2.Diatoms are important components of aquatic life, which support higher trophic levels and are sensitive to nutrient enrichment. We tested a framework that relies on stressor‐response modelling of phosphorus (P) enrichment and stream diatom assemblages across many field locations, multiple years and...

Data from: Identification of candidate effector genes of Pratylenchus penetrans

Paulo Vieira, Thomas Mayer, Sebastian Eves-Van Den Akker, Dana K. Howe, Inga Zasada, Thomas Baum, Jonathan D. Eisenback, Kathryn Kamo, Thomas R. Maier & Thomas J. Baum
Pratylenchus penetrans is one of the most important species among root lesion nematodes (RLNs) due to the detrimental and economic impact that it causes in a wide range of crops. Similar to other plant-parasitic nematodes (PPNs), P. penetrans harbors a significant number of secreted proteins that play key roles during parasitism. Here we combined spatially and temporally resolved next generation sequencing datasets of P. penetrans to select a list of candidate genes aimed at the...

Data from: Identification of resistance to bacterial leaf blight in the U.S. Department of Agriculture Collard Collection

Sandra E. Branham, Mark W. Farnham, Shane M. Robinson & W. Patrick Wechter
Bacterial leaf blight incited by Pseudomonas cannabina pv. alisalensis (Pca) is a devastating disease with incidence reports worldwide and a wide host range capable of infecting all commercially valuable Brassica crops. With no chemical control options available, the most effective form of disease control is host plant resistance, but thus far resistant germplasm has only been identified in Brassica juncea L. (mustard greens). We report the first screening of Brassica oleracea L. var. viridis germplasm,...

Data from: Native grass ground covers provide multiple ecosystem services in Californian vineyards

Kent M. Daane, Brian N. Hogg, Houston Wilson & Glenn Y. Yokota
1. The mechanisms responsible for the success or failure of agricultural diversification are often unknown. Most studies of arthropod pest management focus on enhancing the effectiveness of natural enemies, but non-crop plants can also improve or hamper pest suppression by changing the host quality of crop plants by reducing or adding available soil nutrients or water. Native perennial ground covers may provide resources and long-term habitat to resident natural enemies and be more compatible than...

Data from: Necrobiome framework for bridging decomposition ecology of autotrophically and heterotrophically derived organic matter

Mark Eric Benbow, Philip S. Barton, Michael D. Ulyshen, James C. Beasley, Travis L. DeVault, Michael S. Strickland, Jeffery K. Tomberlin, Heather R. Jordan & Jennifer L. Pechal
Decomposition contributes to global ecosystem function by contributing to nutrient recycling, energy flow and limiting biomass accumulation. The decomposer organisms influencing this process form diverse, complex, and highly dynamic communities that often specialize on different plant or animal resources. Despite performing the same net role, there is a need to conceptually synthesize information on the structure and function of decomposer communities across the spectrum of dead plant and animal resources. A lack of synthesis has...

Data from: Inferring roles in defense from metabolic allocation of rice diterpenoids

Xuan Lu, Juan Zhang, Benjamin Brown, Riqing Li, Julio Rodríguez-Romero, Aileen Berasategui, Bo Liu, Meimei Xu, Dangping Luo, Zhiqiang Pan, Scott R. Baerson, Jonathan Gershenzon, Zhaohu Li, Ane Sesma, Bing Yang & Reuben J. Peters
Among their responses to microbial infection, plants deploy an arsenal of antibiotic natural products. While these historically have been identified on the basis of their antibiotic activity in vitro, this leaves open the question of their relevance to defense in planta. The vast majority of such natural products from the important crop plant rice (Oryza sativa) are diterpenoids whose biosynthesis proceeds via either ent- or syncopalyl diphosphate (CPP) intermediates, and which were isolated on the...

Data from: Hotspot mutations and ColE1 plasmids contribute to the fitness of Salmonella Heidelberg in poultry litter

Adelumola Oladeinde, Kimberly Cook, Alex Orlek, Greg Zock, Kyler Herrington, Nelson Cox, Jodie Plumblee Lawrence & Carolina Hall
Salmonella enterica subsp. enterica serovar Heidelberg (S. Heidelberg) is a clinically-important serovar linked to food-borne illness, and commonly isolated from poultry. Investigations of a large, multistate outbreak in the USA in 2013 identified poultry litter (PL) as an important extra-intestinal environment that may have selected for specific S. Heidelberg strains. Poultry litter is a mixture of bedding materials and chicken excreta that contains chicken gastrointestinal (GI) bacteria, undigested feed, feathers, and other materials of chicken...

Data from: Transpacific coalescent pathways of coconut rhinoceros beetle biotypes: resistance to biological control catalyzes resurgence of an old pest

Jonathan Bradley Reil, Camiel Doorenweerd, Michael San Jose, Sheina B. Sim, Scott M. Geib & Daniel Rubinoff
Biological control agents have several advantages over chemical control for pest management, including the capability to restore ecosystem balance with minimal non-target effects and a lower propensity for targets to develop resistance. These factors are particularly important in the invasive species control. The coconut rhinoceros beetle (Oryctes rhinoceros Linnaeus) is a major palm pest that invaded many Pacific islands in the early 20th century through human-mediated dispersal. Application of the Oryctes nudivirus in the 1960’s...

Data from: Distance, elevation, and environment as drivers of diversity and divergence in bumble bees across latitude and altitude

Jason M. Jackson, Meaghan L. Pimsler, Kennan Jeannet Oyen, Jonathan B. Koch-Uhuad, James D. Herndon, James P. Strange, Michael E. Dillon & Jeffrey D. Lozier
Identifying drivers of dispersal limitation and genetic differentiation is a key goal in biogeography. We examine patterns of population connectivity and genetic diversity using Restriction-site Associated DNA sequencing (RADseq) in two bumble bee species, Bombus vosnesenskii and Bombus bifarius across latitude and altitude in mountain ranges from California, Oregon, and Washington, U.S.A. Bombus vosnesenskii, which occurs across a broader elevational range at most latitudes, exhibits little population structure while B. bifarius, which occupies a relatively...

Data from: Effects of grasshoppers on prairies: herbivore composition matters more than richness in three grassland ecosystems

Angela N. Laws, Chelse M. Prather, David H. Branson & Steven C. Pennings
1. Understanding how biodiversity affects ecosystem processes is a key question in ecology. Previous research has found that increasing plant diversity often enhances many ecosystem processes, but less is known about the role of consumer diversity to ecosystem processes, especially in terrestrial ecosystems. Furthermore, we do not know how general biodiversity responses are among ecosystem types. 2. We examined the role of insect herbivore (Orthoptera) diversity on plant production using parallel field experiments in three...

Registration Year

  • 2018
    48

Resource Types

  • Dataset
    48

Affiliations

  • United States Department of Agriculture
    48
  • University of Montana
    7
  • University of Minnesota
    4
  • University of Hawaii at Manoa
    4
  • Northern Arizona University
    4
  • University of Idaho
    4
  • University of Washington
    3
  • Utah State University
    3
  • University of Georgia
    3
  • University of Wyoming
    3